The first time I used the End Gateway (EG) fill command to create a custom portal, I was able to properly teleport across large distances despite having low render rates. However, I destroyed the old EG to replace it with an EG that had updated coordinates. However, every time I use the EG with updated coordinates, I am instantly teleported to the void at 0,0,0. I am not sure why my game began teleporting me to the end once I replaced the old EG with a new one. I even tested the same command on a new world to see if the problem was merely a single world issue but the issue reoccured on the new world.
Command Used: /fill 386 66 -307 386 64 -306 end_gateway{Age:180,ExactTeleport:1, ExitPortal:{x:1857,y:92,z:-745}}
Video of Bugged Gateway: https://streamable.com/2j15yb
Commands are case-sensitive.
This one should work:
X, Y, and Z must be uppercase.